In the final draft script of "Charlie X", this character was initially described as "an attractive, young female crewman" and her altered appearance was referred to as "aged... many years... lined..." with her hands also characterized as "aged."

Her uniform is command division gold, and bears no sleeve stripes, which means she was an ensign or enlisted, or possibly one of the many lieutenants without rank insignia. This is one of only a handful of appearances of a female crewmember wearing the late 2260s uniform with pants rather than a skirt.

This command division yeoman was a crew member who visited the bridge as the Enterprise approached the wreck of the USS Constellation and went to red alert upon discovery in 2267. (TOS: "The Doomsday Machine")

All 170 crew members were played by extras, production staff members, and fans. Most of them received no on-screen credit for their appearances. They were cast by a cattle call, organized by Bjo Trimble and had to fulfill these special requests: "aged between 20 and 40, men from 5'8" to 6'2", sizes 40-42, and women from 5'6" to 5'8', sizes 8-10"